165669868 has 48 divisors (see below), whose sum is σ = 366501184. Its totient is φ = 63763200.

The previous prime is 165669827. The next prime is 165669869. The reversal of 165669868 is 868966561.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (165669869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7318 + ... + 19618.

Almost surely, 2^165669868 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165669868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183250592).

165669868 is an abundant number, since it is smaller than the sum of its proper divisors (200831316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165669868 is a wasteful number, since it uses less digits than its factorization.

165669868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12362 (or 12360 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 55.

The square root of 165669868 is about 12871.2807443549. The cubic root of 165669868 is about 549.2218947463.

The spelling of 165669868 in words is "one hundred sixty-five million, six hundred sixty-nine thousand, eight hundred sixty-eight".